ATE83345T1 - COMMUNICATION SATELLITE SYSTEM ON QUASI-STATIONARY RAILWAYS. - Google Patents

COMMUNICATION SATELLITE SYSTEM ON QUASI-STATIONARY RAILWAYS.

Info

Publication number
ATE83345T1
ATE83345T1 AT87103362T AT87103362T ATE83345T1 AT E83345 T1 ATE83345 T1 AT E83345T1 AT 87103362 T AT87103362 T AT 87103362T AT 87103362 T AT87103362 T AT 87103362T AT E83345 T1 ATE83345 T1 AT E83345T1
Authority
AT
Austria
Prior art keywords
satellites
satellite
orbital
another
quasi
Prior art date
Application number
AT87103362T
Other languages
German (de)
Inventor
Peter Dipl-Ing Dondl
Original Assignee
Siemens Ag
Ant Nachrichtentech
Messerschmitt Boelkow Blohm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag, Ant Nachrichtentech, Messerschmitt Boelkow Blohm filed Critical Siemens Ag
Application granted granted Critical
Publication of ATE83345T1 publication Critical patent/ATE83345T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/195—Non-synchronous stations

Abstract

In a telecommunications satellite system operating with quasi-stationary orbits and comprising a plurality of earth satellites having elliptical orbits appearing at nearly the same location in space in cyclical succession and relieving one another in radio operation, a different range of the respective satellites to be engaged and disengaged from the ground stations is guaranteed. This enables an additional transit time for storage of data transmitted about the switching time from one satellite to another. To this end, the apogee of the orbital ellipse is shifted to such a degree from the Northern-most or, respectively, Southern-most orbital point against the direction of flight of the respective satellite that an adequate signal repetition of the bits to be transmitted occurs about the switching time. In a specific system comprising three satellites on elliptical orbits having an eccentricity of 0.713 and orbital times of 12 hours, a guaranteed radio spacing difference of one satellite relieving another of 75 km from ground stations occurs given a shift of the apogee from the Northern-most orbital point by 0.2 DEG against the flight direction of the satellites. The lengthening of the propagation time therefore obtainable corresponds to a repetition of 1.024 bits given a rate of 2.048 Mbit/s.
AT87103362T 1986-03-11 1987-03-09 COMMUNICATION SATELLITE SYSTEM ON QUASI-STATIONARY RAILWAYS. ATE83345T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863607931 DE3607931A1 (en) 1986-03-11 1986-03-11 TELECOMMUNICATION SATELLITE SYSTEM ON QUASISTATIONAL RAILWAYS
EP87103362A EP0237009B1 (en) 1986-03-11 1987-03-09 Satellite communication system using quasi-stationary orbits

Publications (1)

Publication Number Publication Date
ATE83345T1 true ATE83345T1 (en) 1992-12-15

Family

ID=6295978

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87103362T ATE83345T1 (en) 1986-03-11 1987-03-09 COMMUNICATION SATELLITE SYSTEM ON QUASI-STATIONARY RAILWAYS.

Country Status (5)

Country Link
US (1) US4827421A (en)
EP (1) EP0237009B1 (en)
JP (1) JPS62219727A (en)
AT (1) ATE83345T1 (en)
DE (2) DE3607931A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922761C2 (en) * 1989-07-11 1994-08-25 Deutsche Aerospace Method and device for aligning a geostationary satellite in a reference direction
US5124925A (en) * 1990-01-16 1992-06-23 Space Systems/Loral, Inc. Method for controlling east/west motion of a geostationary satellite
US5433726A (en) * 1991-04-22 1995-07-18 Trw Inc. Medium-earth-altitude satellite-based cellular telecommunications system
US5439190A (en) * 1991-04-22 1995-08-08 Trw Inc. Medium-earth-altitude satellite-based cellular telecommunications
DE69218023T2 (en) * 1991-04-22 1997-07-10 Trw Inc Cellular telephone satellite system
FR2685833B1 (en) * 1991-12-26 1994-02-11 Agence Spatiale Europeenne COMMUNICATION SATELLITE NETWORK.
US5500648A (en) * 1993-08-11 1996-03-19 Motorola, Inc. Geolocation responsive radio telecommunication system and method therefor
IT1261940B (en) * 1993-09-24 1996-06-04 Alenia Spazio Spa TELECOMMUNICATIONS AND REMOTE SENSING SYSTEM VIA SATELLITE BASED ON THE USE OF SHORT-TERM ELLIPSY ELLIPTICAL ORBITS.
US6795687B1 (en) * 1998-04-06 2004-09-21 Virtual Geosatellite Llc Elliptical satellite system emulating characteristics of geosynchronous satellites during the apogee portion of an elliptical orbit
US6678519B2 (en) * 1995-03-24 2004-01-13 Virtual Geosatellite, Llc Elliptical satellite system which emulates the characteristics of geosynchronous satellites
US5845206A (en) * 1995-03-24 1998-12-01 Virtual Geosatellite Holdings, Inc. Elliptical satellite system which emulates the characteristics of geosynchronous satellites
JPH10256974A (en) * 1997-03-14 1998-09-25 Mitsubishi Electric Corp Satellite communication system for mobile object
JP3153496B2 (en) 1997-05-21 2001-04-09 株式会社日立製作所 Communication service providing method using artificial satellite with long stay time in zenith direction
JP3477115B2 (en) * 1999-03-16 2003-12-10 株式会社日立製作所 Method for broadcasting via satellite, satellite broadcasting system, satellite broadcasting base station, and satellite broadcasting terminal
US6695259B1 (en) 1997-05-21 2004-02-24 Hitachi, Ltd. Communication system, communication receiving device and communication terminal in the system
US20030189136A1 (en) * 1998-05-20 2003-10-09 Toshihide Maeda Communication system, communication receiving device and communication terminal in the system
US6954613B1 (en) * 1999-09-10 2005-10-11 Virtual Geosatellite Holdings, Inc. Fixed satellite constellation system employing non-geostationary satellites in sub-geosynchronous elliptical orbits with common ground tracks
US6305646B1 (en) * 1999-12-21 2001-10-23 Hughes Electronics Corporation Eccentricity control strategy for inclined geosynchronous orbits
US6695260B2 (en) * 2000-02-03 2004-02-24 Virtual Geosatellite Llc Virtually geostationary satellite array
US20070135040A1 (en) * 2005-12-12 2007-06-14 Draim John E Methods for effecting seamless handover and enhancing capacity in elliptical orbit satellite communications systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3145207A1 (en) * 1981-02-28 1982-09-23 Siemens AG, 1000 Berlin und 8000 München TELECOMMUNICATION SATELLITE SYSTEM WITH GEOSTATIONAL POSITION LOOPS
DE3437317A1 (en) * 1984-10-11 1986-04-24 Deutsche Bundespost, vertreten durch den Präsidenten des Fernmeldetechnischen Zentralamtes, 6100 Darmstadt RADIO TRANSMISSION METHOD OVER EARTH SATELLITES
JPS61144139A (en) * 1984-12-18 1986-07-01 Nec Corp Satellite communication system

Also Published As

Publication number Publication date
EP0237009A2 (en) 1987-09-16
JPH0553411B2 (en) 1993-08-10
DE3782956D1 (en) 1993-01-21
JPS62219727A (en) 1987-09-28
EP0237009B1 (en) 1992-12-09
US4827421A (en) 1989-05-02
EP0237009A3 (en) 1989-11-15
DE3607931A1 (en) 1987-09-17

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Legal Events

Date Code Title Description
EEIH Change in the person of patent owner
REN Ceased due to non-payment of the annual fee